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Rockwell Automation 865 Differential Protection Relay User Manual

Page 154

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8-12 Applications

865-UM001A-EN-P – July 2009

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Figure 8.6 – Typical differential protection of a Dyn11 transformer using Allen-Bradley 865 Relay

(Primary and Secondary Current Transformers connected according to Additive Polarity)

Settings:

ConnGrp Dy11
IoCmps OFF
I’oCmps ON
Un

High side voltage

U’n

Low side voltage